CVE-2026-34721CWE-352

Zammad has Cross-site request forgery (CSRF) in OAuth callback endpoints

Medium · published April 8, 2026

CVSS v4.0
5.9
EPSS
0%
Percentile
3.8
In the wild
Unconfirmed
What it is

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the OAuth callback endpoints for Microsoft, Google, and Facebook external credentials do not validate a CSRF state parameter. This vulnerability is fixed in 7.0.1 and 6.5.4.

The record
Technical detail
CVSS v4.0
5.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00149 · 3.8th percentile
Weakness
CWE-352 · Cross-Site Request Forgery (CSRF)
Published
2026-04-08T18:12Z
EPSS history
Timeline
  • 08 APR 18:12Z
    Zammad has Cross-site request forgery (CSRF) in OAuth callback endpoints
    cvelistv5